【PHP爬虫】curl+simple_html_dom 抓取百度最新消息新闻标题，来源，URL

<title>新闻转载统计</title>
<script>
function submit(){
wd=document.getElementById('name').value;
page=document.getElementById('page').value;
source=document.getElementById('source').value;
window.location.href='getbaidu.php?wd='+wd+'&page='+page+'&source='+source;
}
</script>
<?php
//author:zeze
//describe: 新闻标题，来源，URL统计，通过百度最新消息
header('Content-Type: text/html; charset=utf-8');

//加载解析器
include('./simple_html_dom.php');

//数据库信息
$host = '';
$user = '';
$user_pwd = '';
$database = '';
$conn = mysql_connect($host,$user,$user_pwd) or die('sss');
mysql_select_db($database,$conn) or die('dddd');
mysql_query('set names utf8');

$html = new simple_html_dom();

function httpbaidu($url){
$header = array (
'User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36'
);
$ch = curl_init ();
curl_setopt ( $ch, CURLOPT_URL, $url );
curl_setopt ( $ch, CURLOPT_HTTPHEADER, $header );
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );
// 执行
$content = curl_exec ( $ch );
if ($content == FALSE) {
echo "error:" . curl_error ( $ch );
}
// 关闭
curl_close ( $ch );
//echo $content;
return $content;
}
$keyword='';
$page=1;
$source='';//来源
if(isset($_GET['wd']))
$keyword=urlencode($_GET['wd']);
if(isset($_GET['page']))
$page=urlencode($_GET['page']);
if(isset($_GET['source']))
$source=$_GET['source'];

echo "<span style='color:red'>输入新闻标题:</span><input style='width: 500px;'type=text id=name value='".urldecode($keyword)."'></input> 来源<input style='width: 100px;'type=text id=source value='".$source."'></input> 页数<input style='width: 50px;'type=text id=page value='".$page."'></input><button onclick='submit()'>查询</button></br><p>";

for($i=0;$i<$page;$i++){
$url='https://www.baidu.com/s?tn=baidurt&ie=utf-8&wd='.$keyword.'&pn='.$i.'0&bsst=1';
//echo $url;
$contents=httpbaidu($url);

$html = $html->load($contents);
$title='';
$site='未知';
$urlStr='';
//解析页面
foreach($html->find('h3') as $e) {
$title=$e->plaintext;
//echo '网站：'.'来源:'.$source.'<br />';
foreach($e->find('a') as $e1) {
$urlStr=$e1->href;
//echo '网址:'.$e1->href.'<br />';
$query = "select name from source_field where '".$e1->href."' like CONCAT('%',url,'%') and source_type in (1,5)";
//echo $query.'<br />';;
$res = mysql_query($query);
if($res){
}else{
die('die');
}
$result=mysql_fetch_array($res);
$site=$result['name'];
}
echo $title.'<br />';
echo '网站：'.$site.'      来源:'.$source.'<br />';
echo '网址:'.$urlStr.'<br />';
echo '<br>';
}
}
?>

<?php
/**
* Website: http://sourceforge.net/projects/simplehtmldom/ * Additional projects that may be used: http://sourceforge.net/projects/debugobject/ * Acknowledge: Jose Solorzano (https://sourceforge.net/projects/php-html/)
* Contributions by:
*	 Yousuke Kumakura (Attribute filters)
*	 Vadim Voituk (Negative indexes supports of "find" method)
*	 Antcs (Constructor with automatically load contents either text or file/url)
*
* all affected sections have comments starting with "PaperG"
*
* Paperg - Added case insensitive testing of the value of the selector.
* Paperg - Added tag_start for the starting index of tags - NOTE: This works but not accurately.
*  This tag_start gets counted AFTER \r\n have been crushed out, and after the remove_noice calls so it will not reflect the REAL position of the tag in the source,
*  it will almost always be smaller by some amount.
*  We use this to determine how far into the file the tag in question is.  This "percentage will never be accurate as the $dom->size is the "real" number of bytes the dom was created from.
*  but for most purposes, it's a really good estimation.
* Paperg - Added the forceTagsClosed to the dom constructor.  Forcing tags closed is great for malformed html, but it CAN lead to parsing errors.
* Allow the user to tell us how much they trust the html.
* Paperg add the text and plaintext to the selectors for the find syntax.  plaintext implies text in the innertext of a node.  text implies that the tag is a text node.
* This allows for us to find tags based on the text they contain.
* Create find_ancestor_tag to see if a tag is - at any level - inside of another specific tag.
* Paperg: added parse_charset so that we know about the character set of the source document.
*  NOTE:  If the user's system has a routine called get_last_retrieve_url_contents_content_type availalbe, we will assume it's returning the content-type header from the
*  last transfer or curl_exec, and we will parse that and use it in preference to any other method of charset detection.
*
* Found infinite loop in the case of broken html in restore_noise.  Rewrote to protect from that.
* PaperG (John Schlick) Added get_display_size for "IMG" tags.
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @author S.C. Chen <me578022@gmail.com>
* @author John Schlick
* @author Rus Carroll
* @version 1.5 ($Rev: 210 $)
* @package PlaceLocalInclude
* @subpackage simple_html_dom
*/

/**
* All of the Defines for the classes below.
* @author S.C. Chen <me578022@gmail.com>
*/
define('HDOM_TYPE_ELEMENT', 1);
define('HDOM_TYPE_COMMENT', 2);
define('HDOM_TYPE_TEXT',	3);
define('HDOM_TYPE_ENDTAG',  4);
define('HDOM_TYPE_ROOT',	5);
define('HDOM_TYPE_UNKNOWN', 6);
define('HDOM_QUOTE_DOUBLE', 0);
define('HDOM_QUOTE_SINGLE', 1);
define('HDOM_QUOTE_NO',	 3);
define('HDOM_INFO_BEGIN',   0);
define('HDOM_INFO_END',	 1);
define('HDOM_INFO_QUOTE',   2);
define('HDOM_INFO_SPACE',   3);
define('HDOM_INFO_TEXT',	4);
define('HDOM_INFO_INNER',   5);
define('HDOM_INFO_OUTER',   6);
define('HDOM_INFO_ENDSPACE',7);
define('DEFAULT_TARGET_CHARSET', 'UTF-8');
define('DEFAULT_BR_TEXT', "\r\n");
define('DEFAULT_SPAN_TEXT', " ");
define('MAX_FILE_SIZE', 600000);
// helper functions
// -----------------------------------------------------------------------------
// get html dom from file
// $maxlen is defined in the code as PHP_STREAM_COPY_ALL which is defined as -1.
function file_get_html($url, $use_include_path = false, $context=null, $offset = -1, $maxLen=-1, $lowercase = true, $forceTagsClosed=true, $target_charset = DEFAULT_TARGET_CHARSET, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)
{
// We DO force the tags to be terminated.
$dom = new simple_html_dom(null, $lowercase, $forceTagsClosed, $target_charset, $stripRN, $defaultBRText, $defaultSpanText);
// For sourceforge users: uncomment the next line and comment the retreive_url_contents line 2 lines down if it is not already done.
$contents = file_get_contents($url, $use_include_path, $context, $offset);
// Paperg - use our own mechanism for getting the contents as we want to control the timeout.
//$contents = retrieve_url_contents($url);
if (empty($contents) || strlen($contents) > MAX_FILE_SIZE)
{
return false;
}
// The second parameter can force the selectors to all be lowercase.
$dom->load($contents, $lowercase, $stripRN);
return $dom;
}

// get html dom from string
function str_get_html($str, $lowercase=true, $forceTagsClosed=true, $target_charset = DEFAULT_TARGET_CHARSET, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)
{
$dom = new simple_html_dom(null, $lowercase, $forceTagsClosed, $target_charset, $stripRN, $defaultBRText, $defaultSpanText);
if (empty($str) || strlen($str) > MAX_FILE_SIZE)
{
$dom->clear();
return false;
}
$dom->load($str, $lowercase, $stripRN);
return $dom;
}

// dump html dom tree
function dump_html_tree($node, $show_attr=true, $deep=0)
{
$node->dump($node);
}

/**
* simple html dom node
* PaperG - added ability for "find" routine to lowercase the value of the selector.
* PaperG - added $tag_start to track the start position of the tag in the total byte index
*
* @package PlaceLocalInclude
*/
class simple_html_dom_node
{
public $nodetype = HDOM_TYPE_TEXT;
public $tag = 'text';
public $attr = array();
public $children = array();
public $nodes = array();
public $parent = null;
// The "info" array - see HDOM_INFO_... for what each element contains.
public $_ = array();
public $tag_start = 0;
private $dom = null;

function __construct($dom)
{
$this->dom = $dom;
$dom->nodes[] = $this;
}

function __destruct()
{
$this->clear();
}

function __toString()
{
return $this->outertext();
}

// clean up memory due to php5 circular references memory leak...
function clear()
{
$this->dom = null;
$this->nodes = null;
$this->parent = null;
$this->children = null;
}

// dump node's tree
function dump($show_attr=true, $deep=0)
{
$lead = str_repeat('	', $deep);

echo $lead.$this->tag;
if ($show_attr && count($this->attr)>0)
{
echo '(';
foreach ($this->attr as $k=>$v)
echo "[$k]=>\"".$this->$k.'", ';
echo ')';
}
echo "\n";

if ($this->nodes)
{
foreach ($this->nodes as $c)
{
$c->dump($show_attr, $deep+1);
}
}
}

// Debugging function to dump a single dom node with a bunch of information about it.
function dump_node($echo=true)
{

$string = $this->tag;
if (count($this->attr)>0)
{
$string .= '(';
foreach ($this->attr as $k=>$v)
{
$string .= "[$k]=>\"".$this->$k.'", ';
}
$string .= ')';
}
if (count($this->_)>0)
{
$string .= ' $_ (';
foreach ($this->_ as $k=>$v)
{
if (is_array($v))
{
$string .= "[$k]=>(";
foreach ($v as $k2=>$v2)
{
$string .= "[$k2]=>\"".$v2.'", ';
}
$string .= ")";
} else {
$string .= "[$k]=>\"".$v.'", ';
}
}
$string .= ")";
}

if (isset($this->text))
{
$string .= " text: (" . $this->text . ")";
}

$string .= " HDOM_INNER_INFO: '";
if (isset($node->_[HDOM_INFO_INNER]))
{
$string .= $node->_[HDOM_INFO_INNER] . "'";
}
else
{
$string .= ' NULL ';
}

$string .= " children: " . count($this->children);
$string .= " nodes: " . count($this->nodes);
$string .= " tag_start: " . $this->tag_start;
$string .= "\n";

if ($echo)
{
echo $string;
return;
}
else
{
return $string;
}
}

// returns the parent of node
// If a node is passed in, it will reset the parent of the current node to that one.
function parent($parent=null)
{
// I am SURE that this doesn't work properly.
// It fails to unset the current node from it's current parents nodes or children list first.
if ($parent !== null)
{
$this->parent = $parent;
$this->parent->nodes[] = $this;
$this->parent->children[] = $this;
}

return $this->parent;
}

// verify that node has children
function has_child()
{
return !empty($this->children);
}

// returns children of node
function children($idx=-1)
{
if ($idx===-1)
{
return $this->children;
}
if (isset($this->children[$idx]))
{
return $this->children[$idx];
}
return null;
}

// returns the first child of node
function first_child()
{
if (count($this->children)>0)
{
return $this->children[0];
}
return null;
}

// returns the last child of node
function last_child()
{
if (($count=count($this->children))>0)
{
return $this->children[$count-1];
}
return null;
}

// returns the next sibling of node
function next_sibling()
{
if ($this->parent===null)
{
return null;
}

$idx = 0;
$count = count($this->parent->children);
while ($idx<$count && $this!==$this->parent->children[$idx])
{
++$idx;
}
if (++$idx>=$count)
{
return null;
}
return $this->parent->children[$idx];
}

// returns the previous sibling of node
function prev_sibling()
{
if ($this->parent===null) return null;
$idx = 0;
$count = count($this->parent->children);
while ($idx<$count && $this!==$this->parent->children[$idx])
++$idx;
if (--$idx<0) return null;
return $this->parent->children[$idx];
}

// function to locate a specific ancestor tag in the path to the root.
function find_ancestor_tag($tag)
{
global $debug_object;
if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

// Start by including ourselves in the comparison.
$returnDom = $this;

while (!is_null($returnDom))
{
if (is_object($debug_object)) { $debug_object->debug_log(2, "Current tag is: " . $returnDom->tag); }

if ($returnDom->tag == $tag)
{
break;
}
$returnDom = $returnDom->parent;
}
return $returnDom;
}

// get dom node's inner html
function innertext()
{
if (isset($this->_[HDOM_INFO_INNER])) return $this->_[HDOM_INFO_INNER];
if (isset($this->_[HDOM_INFO_TEXT])) return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);

$ret = '';
foreach ($this->nodes as $n)
$ret .= $n->outertext();
return $ret;
}

// get dom node's outer text (with tag)
function outertext()
{
global $debug_object;
if (is_object($debug_object))
{
$text = '';
if ($this->tag == 'text')
{
if (!empty($this->text))
{
$text = " with text: " . $this->text;
}
}
$debug_object->debug_log(1, 'Innertext of tag: ' . $this->tag . $text);
}

if ($this->tag==='root') return $this->innertext();

// trigger callback
if ($this->dom && $this->dom->callback!==null)
{
call_user_func_array($this->dom->callback, array($this));
}

if (isset($this->_[HDOM_INFO_OUTER])) return $this->_[HDOM_INFO_OUTER];
if (isset($this->_[HDOM_INFO_TEXT])) return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);

// render begin tag
if ($this->dom && $this->dom->nodes[$this->_[HDOM_INFO_BEGIN]])
{
$ret = $this->dom->nodes[$this->_[HDOM_INFO_BEGIN]]->makeup();
} else {
$ret = "";
}

// render inner text
if (isset($this->_[HDOM_INFO_INNER]))
{
// If it's a br tag...  don't return the HDOM_INNER_INFO that we may or may not have added.
if ($this->tag != "br")
{
$ret .= $this->_[HDOM_INFO_INNER];
}
} else {
if ($this->nodes)
{
foreach ($this->nodes as $n)
{
$ret .= $this->convert_text($n->outertext());
}
}
}

// render end tag
if (isset($this->_[HDOM_INFO_END]) && $this->_[HDOM_INFO_END]!=0)
$ret .= '</'.$this->tag.'>';
return $ret;
}

// get dom node's plain text
function text()
{
if (isset($this->_[HDOM_INFO_INNER])) return $this->_[HDOM_INFO_INNER];
switch ($this->nodetype)
{
case HDOM_TYPE_TEXT: return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);
case HDOM_TYPE_COMMENT: return '';
case HDOM_TYPE_UNKNOWN: return '';
}
if (strcasecmp($this->tag, 'script')===0) return '';
if (strcasecmp($this->tag, 'style')===0) return '';

$ret = '';
// In rare cases, (always node type 1 or HDOM_TYPE_ELEMENT - observed for some span tags, and some p tags) $this->nodes is set to NULL.
// NOTE: This indicates that there is a problem where it's set to NULL without a clear happening.
// WHY is this happening?
if (!is_null($this->nodes))
{
foreach ($this->nodes as $n)
{
$ret .= $this->convert_text($n->text());
}

// If this node is a span... add a space at the end of it so multiple spans don't run into each other.  This is plaintext after all.
if ($this->tag == "span")
{
$ret .= $this->dom->default_span_text;
}

}
return $ret;
}

function xmltext()
{
$ret = $this->innertext();
$ret = str_ireplace('<![CDATA[', '', $ret);
$ret = str_replace(']]>', '', $ret);
return $ret;
}

// build node's text with tag
function makeup()
{
// text, comment, unknown
if (isset($this->_[HDOM_INFO_TEXT])) return $this->dom->restore_noise($this->_[HDOM_INFO_TEXT]);

$ret = '<'.$this->tag;
$i = -1;

foreach ($this->attr as $key=>$val)
{
++$i;

// skip removed attribute
if ($val===null || $val===false)
continue;

$ret .= $this->_[HDOM_INFO_SPACE][$i][0];
//no value attr: nowrap, checked selected...
if ($val===true)
$ret .= $key;
else {
switch ($this->_[HDOM_INFO_QUOTE][$i])
{
case HDOM_QUOTE_DOUBLE: $quote = '"'; break;
case HDOM_QUOTE_SINGLE: $quote = '\''; break;
default: $quote = '';
}
$ret .= $key.$this->_[HDOM_INFO_SPACE][$i][1].'='.$this->_[HDOM_INFO_SPACE][$i][2].$quote.$val.$quote;
}
}
$ret = $this->dom->restore_noise($ret);
return $ret . $this->_[HDOM_INFO_ENDSPACE] . '>';
}

// find elements by css selector
//PaperG - added ability for find to lowercase the value of the selector.
function find($selector, $idx=null, $lowercase=false)
{
$selectors = $this->parse_selector($selector);
if (($count=count($selectors))===0) return array();
$found_keys = array();

// find each selector
for ($c=0; $c<$count; ++$c)
{
// The change on the below line was documented on the sourceforge code tracker id 2788009
// used to be: if (($levle=count($selectors[0]))===0) return array();
if (($levle=count($selectors[$c]))===0) return array();
if (!isset($this->_[HDOM_INFO_BEGIN])) return array();

$head = array($this->_[HDOM_INFO_BEGIN]=>1);

// handle descendant selectors, no recursive!
for ($l=0; $l<$levle; ++$l)
{
$ret = array();
foreach ($head as $k=>$v)
{
$n = ($k===-1) ? $this->dom->root : $this->dom->nodes[$k];
//PaperG - Pass this optional parameter on to the seek function.
$n->seek($selectors[$c][$l], $ret, $lowercase);
}
$head = $ret;
}

foreach ($head as $k=>$v)
{
if (!isset($found_keys[$k]))
{
$found_keys[$k] = 1;
}
}
}

// sort keys
ksort($found_keys);

$found = array();
foreach ($found_keys as $k=>$v)
$found[] = $this->dom->nodes[$k];

// return nth-element or array
if (is_null($idx)) return $found;
else if ($idx<0) $idx = count($found) + $idx;
return (isset($found[$idx])) ? $found[$idx] : null;
}

// seek for given conditions
// PaperG - added parameter to allow for case insensitive testing of the value of a selector.
protected function seek($selector, &$ret, $lowercase=false)
{
global $debug_object;
if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

list($tag, $key, $val, $exp, $no_key) = $selector;

// xpath index
if ($tag && $key && is_numeric($key))
{
$count = 0;
foreach ($this->children as $c)
{
if ($tag==='*' || $tag===$c->tag) {
if (++$count==$key) {
$ret[$c->_[HDOM_INFO_BEGIN]] = 1;
return;
}
}
}
return;
}

$end = (!empty($this->_[HDOM_INFO_END])) ? $this->_[HDOM_INFO_END] : 0;
if ($end==0) {
$parent = $this->parent;
while (!isset($parent->_[HDOM_INFO_END]) && $parent!==null) {
$end -= 1;
$parent = $parent->parent;
}
$end += $parent->_[HDOM_INFO_END];
}

for ($i=$this->_[HDOM_INFO_BEGIN]+1; $i<$end; ++$i) {
$node = $this->dom->nodes[$i];

$pass = true;

if ($tag==='*' && !$key) {
if (in_array($node, $this->children, true))
$ret[$i] = 1;
continue;
}

// compare tag
if ($tag && $tag!=$node->tag && $tag!=='*') {$pass=false;}
// compare key
if ($pass && $key) {
if ($no_key) {
if (isset($node->attr[$key])) $pass=false;
} else {
if (($key != "plaintext") && !isset($node->attr[$key])) $pass=false;
}
}
// compare value
if ($pass && $key && $val  && $val!=='*') {
// If they have told us that this is a "plaintext" search then we want the plaintext of the node - right?
if ($key == "plaintext") {
// $node->plaintext actually returns $node->text();
$nodeKeyValue = $node->text();
} else {
// this is a normal search, we want the value of that attribute of the tag.
$nodeKeyValue = $node->attr[$key];
}
if (is_object($debug_object)) {$debug_object->debug_log(2, "testing node: " . $node->tag . " for attribute: " . $key . $exp . $val . " where nodes value is: " . $nodeKeyValue);}

//PaperG - If lowercase is set, do a case insensitive test of the value of the selector.
if ($lowercase) {
$check = $this->match($exp, strtolower($val), strtolower($nodeKeyValue));
} else {
$check = $this->match($exp, $val, $nodeKeyValue);
}
if (is_object($debug_object)) {$debug_object->debug_log(2, "after match: " . ($check ? "true" : "false"));}

// handle multiple class
if (!$check && strcasecmp($key, 'class')===0) {
foreach (explode(' ',$node->attr[$key]) as $k) {
// Without this, there were cases where leading, trailing, or double spaces lead to our comparing blanks - bad form.
if (!empty($k)) {
if ($lowercase) {
$check = $this->match($exp, strtolower($val), strtolower($k));
} else {
$check = $this->match($exp, $val, $k);
}
if ($check) break;
}
}
}
if (!$check) $pass = false;
}
if ($pass) $ret[$i] = 1;
unset($node);
}
// It's passed by reference so this is actually what this function returns.
if (is_object($debug_object)) {$debug_object->debug_log(1, "EXIT - ret: ", $ret);}
}

protected function match($exp, $pattern, $value) {
global $debug_object;
if (is_object($debug_object)) {$debug_object->debug_log_entry(1);}

switch ($exp) {
case '=':
return ($value===$pattern);
case '!=':
return ($value!==$pattern);
case '^=':
return preg_match("/^".preg_quote($pattern,'/')."/", $value);
case '$=':
return preg_match("/".preg_quote($pattern,'/')."$/", $value);
case '*=':
if ($pattern[0]=='/') {
return preg_match($pattern, $value);
}
return preg_match("/".$pattern."/i", $value);
}
return false;
}

protected function parse_selector($selector_string) {
global $debug_object;
if (is_object($debug_object)) {$debug_object->debug_log_entry(1);}

// pattern of CSS selectors, modified from mootools
// Paperg: Add the colon to the attrbute, so that it properly finds <tag attr:ibute="something" > like google does.
// Note: if you try to look at this attribute, yo MUST use getAttribute since $dom->x:y will fail the php syntax check.
// Notice the \[ starting the attbute?  and the @? following?  This implies that an attribute can begin with an @ sign that is not captured.
// This implies that an html attribute specifier may start with an @ sign that is NOT captured by the expression.
// farther study is required to determine of this should be documented or removed.
//		$pattern = "/([\w-:\*]*)(?:\#([\w-]+)|\.([\w-]+))?(?:\[@?(!?[\w-]+)(?:([!*^$]?=)[\"']?(.*?)[\"']?)?\])?([\/, ]+)/is";
$pattern = "/([\w-:\*]*)(?:\#([\w-]+)|\.([\w-]+))?(?:\[@?(!?[\w-:]+)(?:([!*^$]?=)[\"']?(.*?)[\"']?)?\])?([\/, ]+)/is";
preg_match_all($pattern, trim($selector_string).' ', $matches, PREG_SET_ORDER);
if (is_object($debug_object)) {$debug_object->debug_log(2, "Matches Array: ", $matches);}

$selectors = array();
$result = array();
//print_r($matches);

foreach ($matches as $m) {
$m[0] = trim($m[0]);
if ($m[0]==='' || $m[0]==='/' || $m[0]==='//') continue;
// for browser generated xpath
if ($m[1]==='tbody') continue;

list($tag, $key, $val, $exp, $no_key) = array($m[1], null, null, '=', false);
if (!empty($m[2])) {$key='id'; $val=$m[2];}
if (!empty($m[3])) {$key='class'; $val=$m[3];}
if (!empty($m[4])) {$key=$m[4];}
if (!empty($m[5])) {$exp=$m[5];}
if (!empty($m[6])) {$val=$m[6];}

// convert to lowercase
if ($this->dom->lowercase) {$tag=strtolower($tag); $key=strtolower($key);}
//elements that do NOT have the specified attribute
if (isset($key[0]) && $key[0]==='!') {$key=substr($key, 1); $no_key=true;}

$result[] = array($tag, $key, $val, $exp, $no_key);
if (trim($m[7])===',') {
$selectors[] = $result;
$result = array();
}
}
if (count($result)>0)
$selectors[] = $result;
return $selectors;
}

function __get($name)
{
if (isset($this->attr[$name]))
{
return $this->convert_text($this->attr[$name]);
}
switch ($name)
{
case 'outertext': return $this->outertext();
case 'innertext': return $this->innertext();
case 'plaintext': return $this->text();
case 'xmltext': return $this->xmltext();
default: return array_key_exists($name, $this->attr);
}
}

function __set($name, $value)
{
global $debug_object;
if (is_object($debug_object)) {$debug_object->debug_log_entry(1);}

switch ($name)
{
case 'outertext': return $this->_[HDOM_INFO_OUTER] = $value;
case 'innertext':
if (isset($this->_[HDOM_INFO_TEXT])) return $this->_[HDOM_INFO_TEXT] = $value;
return $this->_[HDOM_INFO_INNER] = $value;
}
if (!isset($this->attr[$name]))
{
$this->_[HDOM_INFO_SPACE][] = array(' ', '', '');
$this->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_DOUBLE;
}
$this->attr[$name] = $value;
}

function __isset($name)
{
switch ($name)
{
case 'outertext': return true;
case 'innertext': return true;
case 'plaintext': return true;
}
//no value attr: nowrap, checked selected...
return (array_key_exists($name, $this->attr)) ? true : isset($this->attr[$name]);
}

function __unset($name) {
if (isset($this->attr[$name]))
unset($this->attr[$name]);
}

// PaperG - Function to convert the text from one character set to another if the two sets are not the same.
function convert_text($text)
{
global $debug_object;
if (is_object($debug_object)) {$debug_object->debug_log_entry(1);}

$converted_text = $text;

$sourceCharset = "";
$targetCharset = "";

if ($this->dom)
{
$sourceCharset = strtoupper($this->dom->_charset);
$targetCharset = strtoupper($this->dom->_target_charset);
}
if (is_object($debug_object)) {$debug_object->debug_log(3, "source charset: " . $sourceCharset . " target charaset: " . $targetCharset);}

if (!empty($sourceCharset) && !empty($targetCharset) && (strcasecmp($sourceCharset, $targetCharset) != 0))
{
// Check if the reported encoding could have been incorrect and the text is actually already UTF-8
if ((strcasecmp($targetCharset, 'UTF-8') == 0) && ($this->is_utf8($text)))
{
$converted_text = $text;
}
else
{
$converted_text = iconv($sourceCharset, $targetCharset, $text);
}
}

// Lets make sure that we don't have that silly BOM issue with any of the utf-8 text we output.
if ($targetCharset == 'UTF-8')
{
if (substr($converted_text, 0, 3) == "\xef\xbb\xbf")
{
$converted_text = substr($converted_text, 3);
}
if (substr($converted_text, -3) == "\xef\xbb\xbf")
{
$converted_text = substr($converted_text, 0, -3);
}
}

return $converted_text;
}

/**
* Returns true if $string is valid UTF-8 and false otherwise.
*
* @param mixed $str String to be tested
* @return boolean
*/
static function is_utf8($str)
{
$c=0; $b=0;
$bits=0;
$len=strlen($str);
for($i=0; $i<$len; $i++)
{
$c=ord($str[$i]);
if($c > 128)
{
if(($c >= 254)) return false;
elseif($c >= 252) $bits=6;
elseif($c >= 248) $bits=5;
elseif($c >= 240) $bits=4;
elseif($c >= 224) $bits=3;
elseif($c >= 192) $bits=2;
else return false;
if(($i+$bits) > $len) return false;
while($bits > 1)
{
$i++;
$b=ord($str[$i]);
if($b < 128 || $b > 191) return false;
$bits--;
}
}
}
return true;
}
/*
function is_utf8($string)
{
//this is buggy
return (utf8_encode(utf8_decode($string)) == $string);
}
*/

/**
* Function to try a few tricks to determine the displayed size of an img on the page.
* NOTE: This will ONLY work on an IMG tag. Returns FALSE on all other tag types.
*
* @author John Schlick
* @version April 19 2012
* @return array an array containing the 'height' and 'width' of the image on the page or -1 if we can't figure it out.
*/
function get_display_size()
{
global $debug_object;

$width = -1;
$height = -1;

if ($this->tag !== 'img')
{
return false;
}

// See if there is aheight or width attribute in the tag itself.
if (isset($this->attr['width']))
{
$width = $this->attr['width'];
}

if (isset($this->attr['height']))
{
$height = $this->attr['height'];
}

// Now look for an inline style.
if (isset($this->attr['style']))
{
// Thanks to user gnarf from stackoverflow for this regular expression.
$attributes = array();
preg_match_all("/([\w-]+)\s*:\s*([^;]+)\s*;?/", $this->attr['style'], $matches, PREG_SET_ORDER);
foreach ($matches as $match) {
$attributes[$match[1]] = $match[2];
}

// If there is a width in the style attributes:
if (isset($attributes['width']) && $width == -1)
{
// check that the last two characters are px (pixels)
if (strtolower(substr($attributes['width'], -2)) == 'px')
{
$proposed_width = substr($attributes['width'], 0, -2);
// Now make sure that it's an integer and not something stupid.
if (filter_var($proposed_width, FILTER_VALIDATE_INT))
{
$width = $proposed_width;
}
}
}

// If there is a width in the style attributes:
if (isset($attributes['height']) && $height == -1)
{
// check that the last two characters are px (pixels)
if (strtolower(substr($attributes['height'], -2)) == 'px')
{
$proposed_height = substr($attributes['height'], 0, -2);
// Now make sure that it's an integer and not something stupid.
if (filter_var($proposed_height, FILTER_VALIDATE_INT))
{
$height = $proposed_height;
}
}
}

}

// Future enhancement:
// Look in the tag to see if there is a class or id specified that has a height or width attribute to it.

// Far future enhancement
// Look at all the parent tags of this image to see if they specify a class or id that has an img selector that specifies a height or width
// Note that in this case, the class or id will have the img subselector for it to apply to the image.

// ridiculously far future development
// If the class or id is specified in a SEPARATE css file thats not on the page, go get it and do what we were just doing for the ones on the page.

$result = array('height' => $height,
'width' => $width);
return $result;
}

// camel naming conventions
function getAllAttributes() {return $this->attr;}
function getAttribute($name) {return $this->__get($name);}
function setAttribute($name, $value) {$this->__set($name, $value);}
function hasAttribute($name) {return $this->__isset($name);}
function removeAttribute($name) {$this->__set($name, null);}
function getElementById($id) {return $this->find("#$id", 0);}
function getElementsById($id, $idx=null) {return $this->find("#$id", $idx);}
function getElementByTagName($name) {return $this->find($name, 0);}
function getElementsByTagName($name, $idx=null) {return $this->find($name, $idx);}
function parentNode() {return $this->parent();}
function childNodes($idx=-1) {return $this->children($idx);}
function firstChild() {return $this->first_child();}
function lastChild() {return $this->last_child();}
function nextSibling() {return $this->next_sibling();}
function previousSibling() {return $this->prev_sibling();}
function hasChildNodes() {return $this->has_child();}
function nodeName() {return $this->tag;}
function appendChild($node) {$node->parent($this); return $node;}

}

/**
* simple html dom parser
* Paperg - in the find routine: allow us to specify that we want case insensitive testing of the value of the selector.
* Paperg - change $size from protected to public so we can easily access it
* Paperg - added ForceTagsClosed in the constructor which tells us whether we trust the html or not.  Default is to NOT trust it.
*
* @package PlaceLocalInclude
*/
class simple_html_dom
{
public $root = null;
public $nodes = array();
public $callback = null;
public $lowercase = false;
// Used to keep track of how large the text was when we started.
public $original_size;
public $size;
protected $pos;
protected $doc;
protected $char;
protected $cursor;
protected $parent;
protected $noise = array();
protected $token_blank = " \t\r\n";
protected $token_equal = ' =/>';
protected $token_slash = " />\r\n\t";
protected $token_attr = ' >';
// Note that this is referenced by a child node, and so it needs to be public for that node to see this information.
public $_charset = '';
public $_target_charset = '';
protected $default_br_text = "";
public $default_span_text = "";

// use isset instead of in_array, performance boost about 30%...
protected $self_closing_tags = array('img'=>1, 'br'=>1, 'input'=>1, 'meta'=>1, 'link'=>1, 'hr'=>1, 'base'=>1, 'embed'=>1, 'spacer'=>1);
protected $block_tags = array('root'=>1, 'body'=>1, 'form'=>1, 'div'=>1, 'span'=>1, 'table'=>1);
// Known sourceforge issue #2977341
// B tags that are not closed cause us to return everything to the end of the document.
protected $optional_closing_tags = array(
'tr'=>array('tr'=>1, 'td'=>1, 'th'=>1),
'th'=>array('th'=>1),
'td'=>array('td'=>1),
'li'=>array('li'=>1),
'dt'=>array('dt'=>1, 'dd'=>1),
'dd'=>array('dd'=>1, 'dt'=>1),
'dl'=>array('dd'=>1, 'dt'=>1),
'p'=>array('p'=>1),
'nobr'=>array('nobr'=>1),
'b'=>array('b'=>1),
'option'=>array('option'=>1),
);

function __construct($str=null, $lowercase=true, $forceTagsClosed=true, $target_charset=DEFAULT_TARGET_CHARSET, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)
{
if ($str)
{
if (preg_match("/^http:\/\//i",$str) || is_file($str))
{
$this->load_file($str);
}
else
{
$this->load($str, $lowercase, $stripRN, $defaultBRText, $defaultSpanText);
}
}
// Forcing tags to be closed implies that we don't trust the html, but it can lead to parsing errors if we SHOULD trust the html.
if (!$forceTagsClosed) {
$this->optional_closing_array=array();
}
$this->_target_charset = $target_charset;
}

function __destruct()
{
$this->clear();
}

// load html from string
function load($str, $lowercase=true, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)
{
global $debug_object;

// prepare
$this->prepare($str, $lowercase, $stripRN, $defaultBRText, $defaultSpanText);
// strip out cdata
$this->remove_noise("'<!\[CDATA\[(.*?)\]\]>'is", true);
// strip out comments
$this->remove_noise("'<!--(.*?)-->'is");
// Per sourceforge http://sourceforge.net/tracker/?func=detail&aid=2949097&group_id=218559&atid=1044037 // Script tags removal now preceeds style tag removal.
// strip out <script> tags
$this->remove_noise("'<\s*script[^>]*[^/]>(.*?)<\s*/\s*script\s*>'is");
$this->remove_noise("'<\s*script\s*>(.*?)<\s*/\s*script\s*>'is");
// strip out <style> tags
$this->remove_noise("'<\s*style[^>]*[^/]>(.*?)<\s*/\s*style\s*>'is");
$this->remove_noise("'<\s*style\s*>(.*?)<\s*/\s*style\s*>'is");
// strip out preformatted tags
$this->remove_noise("'<\s*(?:code)[^>]*>(.*?)<\s*/\s*(?:code)\s*>'is");
// strip out server side scripts
$this->remove_noise("'(<\?)(.*?)(\?>)'s", true);
// strip smarty scripts
$this->remove_noise("'(\{\w)(.*?)(\})'s", true);

// parsing
while ($this->parse());
// end
$this->root->_[HDOM_INFO_END] = $this->cursor;
$this->parse_charset();

// make load function chainable
return $this;

}

// load html from file
function load_file()
{
$args = func_get_args();
$this->load(call_user_func_array('file_get_contents', $args), true);
// Throw an error if we can't properly load the dom.
if (($error=error_get_last())!==null) {
$this->clear();
return false;
}
}

// set callback function
function set_callback($function_name)
{
$this->callback = $function_name;
}

// remove callback function
function remove_callback()
{
$this->callback = null;
}

// save dom as string
function save($filepath='')
{
$ret = $this->root->innertext();
if ($filepath!=='') file_put_contents($filepath, $ret, LOCK_EX);
return $ret;
}

// find dom node by css selector
// Paperg - allow us to specify that we want case insensitive testing of the value of the selector.
function find($selector, $idx=null, $lowercase=false)
{
return $this->root->find($selector, $idx, $lowercase);
}

// clean up memory due to php5 circular references memory leak...
function clear()
{
foreach ($this->nodes as $n) {$n->clear(); $n = null;}
// This add next line is documented in the sourceforge repository. 2977248 as a fix for ongoing memory leaks that occur even with the use of clear.
if (isset($this->children)) foreach ($this->children as $n) {$n->clear(); $n = null;}
if (isset($this->parent)) {$this->parent->clear(); unset($this->parent);}
if (isset($this->root)) {$this->root->clear(); unset($this->root);}
unset($this->doc);
unset($this->noise);
}

function dump($show_attr=true)
{
$this->root->dump($show_attr);
}

// prepare HTML data and init everything
protected function prepare($str, $lowercase=true, $stripRN=true, $defaultBRText=DEFAULT_BR_TEXT, $defaultSpanText=DEFAULT_SPAN_TEXT)
{
$this->clear();

// set the length of content before we do anything to it.
$this->size = strlen($str);
// Save the original size of the html that we got in.  It might be useful to someone.
$this->original_size = $this->size;

//before we save the string as the doc...  strip out the \r \n's if we are told to.
if ($stripRN) {
$str = str_replace("\r", " ", $str);
$str = str_replace("\n", " ", $str);

// set the length of content since we have changed it.
$this->size = strlen($str);
}

$this->doc = $str;
$this->pos = 0;
$this->cursor = 1;
$this->noise = array();
$this->nodes = array();
$this->lowercase = $lowercase;
$this->default_br_text = $defaultBRText;
$this->default_span_text = $defaultSpanText;
$this->root = new simple_html_dom_node($this);
$this->root->tag = 'root';
$this->root->_[HDOM_INFO_BEGIN] = -1;
$this->root->nodetype = HDOM_TYPE_ROOT;
$this->parent = $this->root;
if ($this->size>0) $this->char = $this->doc[0];
}

// parse html content
protected function parse()
{
if (($s = $this->copy_until_char('<'))==='')
{
return $this->read_tag();
}

// text
$node = new simple_html_dom_node($this);
++$this->cursor;
$node->_[HDOM_INFO_TEXT] = $s;
$this->link_nodes($node, false);
return true;
}

// PAPERG - dkchou - added this to try to identify the character set of the page we have just parsed so we know better how to spit it out later.
// NOTE:  IF you provide a routine called get_last_retrieve_url_contents_content_type which returns the CURLINFO_CONTENT_TYPE from the last curl_exec
// (or the content_type header from the last transfer), we will parse THAT, and if a charset is specified, we will use it over any other mechanism.
protected function parse_charset()
{
global $debug_object;

$charset = null;

if (function_exists('get_last_retrieve_url_contents_content_type'))
{
$contentTypeHeader = get_last_retrieve_url_contents_content_type();
$success = preg_match('/charset=(.+)/', $contentTypeHeader, $matches);
if ($success)
{
$charset = $matches[1];
if (is_object($debug_object)) {$debug_object->debug_log(2, 'header content-type found charset of: ' . $charset);}
}

}

if (empty($charset))
{
$el = $this->root->find('meta[http-equiv=Content-Type]',0, true);
if (!empty($el))
{
$fullvalue = $el->content;
if (is_object($debug_object)) {$debug_object->debug_log(2, 'meta content-type tag found' . $fullvalue);}

if (!empty($fullvalue))
{
$success = preg_match('/charset=(.+)/i', $fullvalue, $matches);
if ($success)
{
$charset = $matches[1];
}
else
{
// If there is a meta tag, and they don't specify the character set, research says that it's typically ISO-8859-1
if (is_object($debug_object)) {$debug_object->debug_log(2, 'meta content-type tag couldn\'t be parsed. using iso-8859 default.');}
$charset = 'ISO-8859-1';
}
}
}
}

// If we couldn't find a charset above, then lets try to detect one based on the text we got...
if (empty($charset))
{
// Use this in case mb_detect_charset isn't installed/loaded on this machine.
$charset = false;
if (function_exists('mb_detect_encoding'))
{
// Have php try to detect the encoding from the text given to us.
$charset = mb_detect_encoding($this->root->plaintext . "ascii", $encoding_list = array( "UTF-8", "CP1252" ) );
if (is_object($debug_object)) {$debug_object->debug_log(2, 'mb_detect found: ' . $charset);}
}

// and if this doesn't work...  then we need to just wrongheadedly assume it's UTF-8 so that we can move on - cause this will usually give us most of what we need...
if ($charset === false)
{
if (is_object($debug_object)) {$debug_object->debug_log(2, 'since mb_detect failed - using default of utf-8');}
$charset = 'UTF-8';
}
}

// Since CP1252 is a superset, if we get one of it's subsets, we want it instead.
if ((strtolower($charset) == strtolower('ISO-8859-1')) || (strtolower($charset) == strtolower('Latin1')) || (strtolower($charset) == strtolower('Latin-1')))
{
if (is_object($debug_object)) {$debug_object->debug_log(2, 'replacing ' . $charset . ' with CP1252 as its a superset');}
$charset = 'CP1252';
}

if (is_object($debug_object)) {$debug_object->debug_log(1, 'EXIT - ' . $charset);}

return $this->_charset = $charset;
}

// read tag info
protected function read_tag()
{
if ($this->char!=='<')
{
$this->root->_[HDOM_INFO_END] = $this->cursor;
return false;
}
$begin_tag_pos = $this->pos;
$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next

// end tag
if ($this->char==='/')
{
$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
// This represents the change in the simple_html_dom trunk from revision 180 to 181.
// $this->skip($this->token_blank_t);
$this->skip($this->token_blank);
$tag = $this->copy_until_char('>');

// skip attributes in end tag
if (($pos = strpos($tag, ' '))!==false)
$tag = substr($tag, 0, $pos);

$parent_lower = strtolower($this->parent->tag);
$tag_lower = strtolower($tag);

if ($parent_lower!==$tag_lower)
{
if (isset($this->optional_closing_tags[$parent_lower]) && isset($this->block_tags[$tag_lower]))
{
$this->parent->_[HDOM_INFO_END] = 0;
$org_parent = $this->parent;

while (($this->parent->parent) && strtolower($this->parent->tag)!==$tag_lower)
$this->parent = $this->parent->parent;

if (strtolower($this->parent->tag)!==$tag_lower) {
$this->parent = $org_parent; // restore origonal parent
if ($this->parent->parent) $this->parent = $this->parent->parent;
$this->parent->_[HDOM_INFO_END] = $this->cursor;
return $this->as_text_node($tag);
}
}
else if (($this->parent->parent) && isset($this->block_tags[$tag_lower]))
{
$this->parent->_[HDOM_INFO_END] = 0;
$org_parent = $this->parent;

while (($this->parent->parent) && strtolower($this->parent->tag)!==$tag_lower)
$this->parent = $this->parent->parent;

if (strtolower($this->parent->tag)!==$tag_lower)
{
$this->parent = $org_parent; // restore origonal parent
$this->parent->_[HDOM_INFO_END] = $this->cursor;
return $this->as_text_node($tag);
}
}
else if (($this->parent->parent) && strtolower($this->parent->parent->tag)===$tag_lower)
{
$this->parent->_[HDOM_INFO_END] = 0;
$this->parent = $this->parent->parent;
}
else
return $this->as_text_node($tag);
}

$this->parent->_[HDOM_INFO_END] = $this->cursor;
if ($this->parent->parent) $this->parent = $this->parent->parent;

$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
return true;
}

$node = new simple_html_dom_node($this);
$node->_[HDOM_INFO_BEGIN] = $this->cursor;
++$this->cursor;
$tag = $this->copy_until($this->token_slash);
$node->tag_start = $begin_tag_pos;

// doctype, cdata & comments...
if (isset($tag[0]) && $tag[0]==='!') {
$node->_[HDOM_INFO_TEXT] = '<' . $tag . $this->copy_until_char('>');

if (isset($tag[2]) && $tag[1]==='-' && $tag[2]==='-') {
$node->nodetype = HDOM_TYPE_COMMENT;
$node->tag = 'comment';
} else {
$node->nodetype = HDOM_TYPE_UNKNOWN;
$node->tag = 'unknown';
}
if ($this->char==='>') $node->_[HDOM_INFO_TEXT].='>';
$this->link_nodes($node, true);
$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
return true;
}

// text
if ($pos=strpos($tag, '<')!==false) {
$tag = '<' . substr($tag, 0, -1);
$node->_[HDOM_INFO_TEXT] = $tag;
$this->link_nodes($node, false);
$this->char = $this->doc[--$this->pos]; // prev
return true;
}

if (!preg_match("/^[\w-:]+$/", $tag)) {
$node->_[HDOM_INFO_TEXT] = '<' . $tag . $this->copy_until('<>');
if ($this->char==='<') {
$this->link_nodes($node, false);
return true;
}

if ($this->char==='>') $node->_[HDOM_INFO_TEXT].='>';
$this->link_nodes($node, false);
$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
return true;
}

// begin tag
$node->nodetype = HDOM_TYPE_ELEMENT;
$tag_lower = strtolower($tag);
$node->tag = ($this->lowercase) ? $tag_lower : $tag;

// handle optional closing tags
if (isset($this->optional_closing_tags[$tag_lower]) )
{
while (isset($this->optional_closing_tags[$tag_lower][strtolower($this->parent->tag)]))
{
$this->parent->_[HDOM_INFO_END] = 0;
$this->parent = $this->parent->parent;
}
$node->parent = $this->parent;
}

$guard = 0; // prevent infinity loop
$space = array($this->copy_skip($this->token_blank), '', '');

// attributes
do
{
if ($this->char!==null && $space[0]==='')
{
break;
}
$name = $this->copy_until($this->token_equal);
if ($guard===$this->pos)
{
$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
continue;
}
$guard = $this->pos;

// handle endless '<'
if ($this->pos>=$this->size-1 && $this->char!=='>') {
$node->nodetype = HDOM_TYPE_TEXT;
$node->_[HDOM_INFO_END] = 0;
$node->_[HDOM_INFO_TEXT] = '<'.$tag . $space[0] . $name;
$node->tag = 'text';
$this->link_nodes($node, false);
return true;
}

// handle mismatch '<'
if ($this->doc[$this->pos-1]=='<') {
$node->nodetype = HDOM_TYPE_TEXT;
$node->tag = 'text';
$node->attr = array();
$node->_[HDOM_INFO_END] = 0;
$node->_[HDOM_INFO_TEXT] = substr($this->doc, $begin_tag_pos, $this->pos-$begin_tag_pos-1);
$this->pos -= 2;
$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
$this->link_nodes($node, false);
return true;
}

if ($name!=='/' && $name!=='') {
$space[1] = $this->copy_skip($this->token_blank);
$name = $this->restore_noise($name);
if ($this->lowercase) $name = strtolower($name);
if ($this->char==='=') {
$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
$this->parse_attr($node, $name, $space);
}
else {
//no value attr: nowrap, checked selected...
$node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_NO;
$node->attr[$name] = true;
if ($this->char!='>') $this->char = $this->doc[--$this->pos]; // prev
}
$node->_[HDOM_INFO_SPACE][] = $space;
$space = array($this->copy_skip($this->token_blank), '', '');
}
else
break;
} while ($this->char!=='>' && $this->char!=='/');

$this->link_nodes($node, true);
$node->_[HDOM_INFO_ENDSPACE] = $space[0];

// check self closing
if ($this->copy_until_char_escape('>')==='/')
{
$node->_[HDOM_INFO_ENDSPACE] .= '/';
$node->_[HDOM_INFO_END] = 0;
}
else
{
// reset parent
if (!isset($this->self_closing_tags[strtolower($node->tag)])) $this->parent = $node;
}
$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next

// If it's a BR tag, we need to set it's text to the default text.
// This way when we see it in plaintext, we can generate formatting that the user wants.
// since a br tag never has sub nodes, this works well.
if ($node->tag == "br")
{
$node->_[HDOM_INFO_INNER] = $this->default_br_text;
}

return true;
}

// parse attributes
protected function parse_attr($node, $name, &$space)
{
// Per sourceforge: http://sourceforge.net/tracker/?func=detail&aid=3061408&group_id=218559&atid=1044037 // If the attribute is already defined inside a tag, only pay atetntion to the first one as opposed to the last one.
if (isset($node->attr[$name]))
{
return;
}

$space[2] = $this->copy_skip($this->token_blank);
switch ($this->char) {
case '"':
$node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_DOUBLE;
$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
$node->attr[$name] = $this->restore_noise($this->copy_until_char_escape('"'));
$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
break;
case '\'':
$node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_SINGLE;
$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
$node->attr[$name] = $this->restore_noise($this->copy_until_char_escape('\''));
$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
break;
default:
$node->_[HDOM_INFO_QUOTE][] = HDOM_QUOTE_NO;
$node->attr[$name] = $this->restore_noise($this->copy_until($this->token_attr));
}
// PaperG: Attributes should not have \r or \n in them, that counts as html whitespace.
$node->attr[$name] = str_replace("\r", "", $node->attr[$name]);
$node->attr[$name] = str_replace("\n", "", $node->attr[$name]);
// PaperG: If this is a "class" selector, lets get rid of the preceeding and trailing space since some people leave it in the multi class case.
if ($name == "class") {
$node->attr[$name] = trim($node->attr[$name]);
}
}

// link node's parent
protected function link_nodes(&$node, $is_child)
{
$node->parent = $this->parent;
$this->parent->nodes[] = $node;
if ($is_child)
{
$this->parent->children[] = $node;
}
}

// as a text node
protected function as_text_node($tag)
{
$node = new simple_html_dom_node($this);
++$this->cursor;
$node->_[HDOM_INFO_TEXT] = '</' . $tag . '>';
$this->link_nodes($node, false);
$this->char = (++$this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
return true;
}

protected function skip($chars)
{
$this->pos += strspn($this->doc, $chars, $this->pos);
$this->char = ($this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
}

protected function copy_skip($chars)
{
$pos = $this->pos;
$len = strspn($this->doc, $chars, $pos);
$this->pos += $len;
$this->char = ($this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
if ($len===0) return '';
return substr($this->doc, $pos, $len);
}

protected function copy_until($chars)
{
$pos = $this->pos;
$len = strcspn($this->doc, $chars, $pos);
$this->pos += $len;
$this->char = ($this->pos<$this->size) ? $this->doc[$this->pos] : null; // next
return substr($this->doc, $pos, $len);
}

protected function copy_until_char($char)
{
if ($this->char===null) return '';

if (($pos = strpos($this->doc, $char, $this->pos))===false) {
$ret = substr($this->doc, $this->pos, $this->size-$this->pos);
$this->char = null;
$this->pos = $this->size;
return $ret;
}

if ($pos===$this->pos) return '';
$pos_old = $this->pos;
$this->char = $this->doc[$pos];
$this->pos = $pos;
return substr($this->doc, $pos_old, $pos-$pos_old);
}

protected function copy_until_char_escape($char)
{
if ($this->char===null) return '';

$start = $this->pos;
while (1)
{
if (($pos = strpos($this->doc, $char, $start))===false)
{
$ret = substr($this->doc, $this->pos, $this->size-$this->pos);
$this->char = null;
$this->pos = $this->size;
return $ret;
}

if ($pos===$this->pos) return '';

if ($this->doc[$pos-1]==='\\') {
$start = $pos+1;
continue;
}

$pos_old = $this->pos;
$this->char = $this->doc[$pos];
$this->pos = $pos;
return substr($this->doc, $pos_old, $pos-$pos_old);
}
}

// remove noise from html content
// save the noise in the $this->noise array.
protected function remove_noise($pattern, $remove_tag=false)
{
global $debug_object;
if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

$count = preg_match_all($pattern, $this->doc, $matches, PREG_SET_ORDER|PREG_OFFSET_CAPTURE);

for ($i=$count-1; $i>-1; --$i)
{
$key = '___noise___'.sprintf('% 5d', count($this->noise)+1000);
if (is_object($debug_object)) { $debug_object->debug_log(2, 'key is: ' . $key); }
$idx = ($remove_tag) ? 0 : 1;
$this->noise[$key] = $matches[$i][$idx][0];
$this->doc = substr_replace($this->doc, $key, $matches[$i][$idx][1], strlen($matches[$i][$idx][0]));
}

// reset the length of content
$this->size = strlen($this->doc);
if ($this->size>0)
{
$this->char = $this->doc[0];
}
}

// restore noise to html content
function restore_noise($text)
{
global $debug_object;
if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

while (($pos=strpos($text, '___noise___'))!==false)
{
// Sometimes there is a broken piece of markup, and we don't GET the pos+11 etc... token which indicates a problem outside of us...
if (strlen($text) > $pos+15)
{
$key = '___noise___'.$text[$pos+11].$text[$pos+12].$text[$pos+13].$text[$pos+14].$text[$pos+15];
if (is_object($debug_object)) { $debug_object->debug_log(2, 'located key of: ' . $key); }

if (isset($this->noise[$key]))
{
$text = substr($text, 0, $pos).$this->noise[$key].substr($text, $pos+16);
}
else
{
// do this to prevent an infinite loop.
$text = substr($text, 0, $pos).'UNDEFINED NOISE FOR KEY: '.$key . substr($text, $pos+16);
}
}
else
{
// There is no valid key being given back to us... We must get rid of the ___noise___ or we will have a problem.
$text = substr($text, 0, $pos).'NO NUMERIC NOISE KEY' . substr($text, $pos+11);
}
}
return $text;
}

// Sometimes we NEED one of the noise elements.
function search_noise($text)
{
global $debug_object;
if (is_object($debug_object)) { $debug_object->debug_log_entry(1); }

foreach($this->noise as $noiseElement)
{
if (strpos($noiseElement, $text)!==false)
{
return $noiseElement;
}
}
}
function __toString()
{
return $this->root->innertext();
}

function __get($name)
{
switch ($name)
{
case 'outertext':
return $this->root->innertext();
case 'innertext':
return $this->root->innertext();
case 'plaintext':
return $this->root->text();
case 'charset':
return $this->_charset;
case 'target_charset':
return $this->_target_charset;
}
}

// camel naming conventions
function childNodes($idx=-1) {return $this->root->childNodes($idx);}
function firstChild() {return $this->root->first_child();}
function lastChild() {return $this->root->last_child();}
function createElement($name, $value=null) {return @str_get_html("<$name>$value</$name>")->first_child();}
function createTextNode($value) {return @end(str_get_html($value)->nodes);}
function getElementById($id) {return $this->find("#$id", 0);}
function getElementsById($id, $idx=null) {return $this->find("#$id", $idx);}
function getElementByTagName($name) {return $this->find($name, 0);}
function getElementsByTagName($name, $idx=-1) {return $this->find($name, $idx);}
function loadFile() {$args = func_get_args();$this->load_file($args);}
}

?>